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Ok I would have the battery tested. While testing battery make sure all connections are clean and tight on the battery terminals. If battery checks out to be good. Test the charging system, alternator. If alternator tests good make sure you belts are not slipping or worn and stretched out as this could cause a an inconsistent charge. While doing the battery test if posible do a draw test to see if anything is during current all the time as this could be draining or weakening the battery.

open or shorted alternator circuit (control wire)
let your auto store test the alternator charging
on and off the truck.
inspect 3 wire connector for burn or lose connection
disconnect 3 pin wire and start the engine.if the light stay on you have shot to ground.

Car
not starting or turning over indicates towards multiple possibilities. It can
be issue with battery or weak battery. But if battery checks out ok, then it
can be starter issue or faulty alternator or problem with low fuel pressure or
no spark at spark plugs due to dirty spark plugs or faulty ignition coil or
injectors getting cracked or dirty and needs to be cleaned.

To
confirm the problem, the basic troubleshooting is required.

From
start to end troubleshooting these problems I suggest you
to check the help link below and follow its procedure: -----

Mostly
all types of car no start problems are discussed here with solutions:---

it takes your battery to start your vehicle, once started the electrical power is genereated by your alternator, if your altnernator is bad or going bad the car then relies on the battery for the electrical power, the battery will go down or dead because it cannot sustain a charge.
it sounds like you need to test your alternator and maybe replace it.

You first have to make sure the alternator has not failed. Try to fully charge the battery and see if the truck will start. If it starts, remove the battery cables making sure they don't touch the vehicle. If the truck shuts off, the alternator has failed. If it remains running, turn on the head lights along with other accessories. If it shuts off, the alternator still may be weak and needs replacing. Lastly, have the battery load tested to ensure that it still holds a proper charge.

I suggest that you take the car to an autoparts store and have them check the alternator output. That will tell whether the alternator is putting out sufficient voltage to keep the battery charged or not. Most parts stores will check the alternator for free. Hope this helped and best wishes.

(1) Is your alternator charging? take your vehicle to Advanced Autos, Napa or someone like that and have them test your alternator.(2) Is there something in the vehicle causing excessive drain on the battery when the motor is not running... like is the interior light may be on or something to that affect.(3) Are you doing enough driving to recharge your battery? short stops and starts is not good for a battery as you may rob more energy from the battery then you are putting back in.Sounds like something is draining your battery, something must be left on in the vehicle, Advanced Autos or Napa should be able to tell if something is draining your battery when the vehicle is off.

The alternator test will likely indicate a charging problem from the alternator that is not keeping the battery charged up.
Regardless of the alternator test, it would be best to do an electrical draw test to determine whether there is an excess drain on the battery. This can be done with an ammeter between the positive terminal and the positive battery post. This test is done with key off, all accessories off, no lights on, etc. There will be a small draw on the battery in all newer vehicles, but it should be in the order of up to 50 milliamps. If you are getting more than 200 milliamps of current draw then there is a problem with an electrical system that will drain the battery over a period of days or weeks. Once you know this is true, the electrical systems can be methodically tested.

Start vehicle and with vehicle running there should be at least 14 volts when tested at battery leads. If you don't have a volt meter may I suggest taking this vehicle to an AUTO-ZONE and they will test for FREE. They will test the entire charging system including battery and alternator and starter. Good Luck